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Venture twin Montana whcih AC Delco plugs?

Old October 23rd, 2011, 6:58 PM
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Default Venture twin Montana whcih AC Delco plugs?

Several forums say use AC Delco plugs to prevent misfiring etc. 2 AC Delco plugs listed. AC 14 regular Rapidfire plug and the AC 41-940 Professional Platinium. The AC 14 plugs are heat range 3 and the AC 41-940 plugs are heat range 4. I guess the 41-940 are hotter.
Engine not burning oil (leaking some). Which ones should I get? Car has 90 K miles and is 12 years old (1999).
Old October 26th, 2011, 4:29 PM
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Default OEM Plugs are 41-940

New plugs are gapped at .50 not .60 as specified. They are double platinium. Supposedly should not regap.
Should I gap them to .60?
Old October 26th, 2011, 5:32 PM
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Where did you get those plugs and where were they made? There shouldn't be any need to gap them but you can if it makes you sleep better. Just try not to rub on the center electrode. Or, get NGK Platinum plugs.
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